Answer
ANSWER WITH FULL EXPLANATION
If a speed is given km/h, then the formula to convert the speed from km/h to m/s is
km/h = m/s
In other words, if you want to convert the given speed from km/h to m/s, then multiply the given number by and put "m/s" after it.
The speed of a car is 72 km/h.
Converting the speed into m/s
72 km/h = m/s = 20 m/s
∴ The speed of the car (expressed in m/s) is 20 m/s.
SHORT ANSWER
1km/h=5/18m/s
72km/h=72×5/18m/s
=4×5m/s
=20m/s.
HOPE THIS HELPS YOU PLEASE MARK ME AS BRAINLIEST
why is skipping quicker than running
Answer:
because you are taking longer and faster strides
Explanation:
Answer:
you are taking longer to skip.
Explanation:
A car is moving with a speed of 15ms-¹.How long does it take to cover a distance of 1.2km?
1.2 km × 1000 = 1200m
1200m : 15 = 80s
so it will take 80 seconds or 1 minute 20seconds.
An apple is falling from a tree. Disregarding air resistance, which diagram shows the free-body diagram of the force
or forces acting on the apple?
Answer: Second choice (straight down arrow)
Explanation:
I just did it.
Disregarding air resistance, the diagram showing the free-body diagram of the force or forces acting on the apple is second one.
What is free falling?When an object is released from rest in free air considering no friction, the motion is depend only on the acceleration due to gravity, g.
Given is an apple is falling from a tree.
When apple is falling down, the gravity will attract the apple towards the center of the Earth. Air resistance is not considered, otherwise it would be acting upwards.
Normal force will not act as apple in not placed on any kind of surface.
So, the only force acting is force of gravity also called as weight of apple.
Thus, the free-body diagram of the force or forces acting on the apple is second one.
Learn more about free falling.
https://brainly.com/question/13299152
#SPJ6
12. The windings of a particular type of DC motor are in its rotor. The magnetic field is reversed during the rotation of the rotor by means of the
A. field magnets.
B. commutator.
C. applied power source reversal.
D. armature coil split windings.
Answer:
B. commutator
Explanation:
The DC motor has a commutator, to keep the rotor rotating. The rotor of the DC motor usually stop spinning once it aligns with the magnetic field. However, the commutator would reverse the current through the stator and in this process reverse the magnetic field. This ensures continuous spinning of the rotor.
Therefore, the correct option is "B. commutator."
how should an ammeter and voltmeter be connected in a circuit and why?? I need ans acc to grade 10th
Answer:
An ammeter should be connected in the series while the voltmeter in parallel.
Explanation:
Ammeter is the device used to measure the electric current. So , the total current flowing through the circuit must pass through the ammeter. Thus , it should be connected in series. While voltmeter is a device used to measure the potential difference between two ends. Therefore, voltmeter should be connected in parallel to measure the potential difference across two ends.
the liquid pressure varies with depth why
Explanation:
Hey, there!
The liquid pressure varies with depth because liquid pressure is directly proportional to the depth of liquid from the free surface of the liquid. so, more the depth more the pressure and less the depth less the pressure.
Hope it helps...
A man is lifting a piano that weighs 800 N through a distance of 10 meters using a pulley system. The man pulls the rope a total distance of 100m. What force does the man need to apply to the rope?
Answer:
The force the man applied is 80 N
Explanation:
weight of the load, L = 800 N
distance traveled by the load, a = 10 m
distance traveled by the effort, b = 100 m
Output work = load x distance moved by the load
Output work = 800 x 10 = 8000 J
Input work = Effort x distance moved by effort
Input work = Effort x 100 m
Assuming an ideal machine; no friction effect, the input work will be equal to output work.
Effort x 100 m = 8000 J
Effort = 8000 / 100
Effort = 80 N
Therefore, the force the man applied is 80 N
Now the proton at B is removed and replaced by a lithium nucleus, containing three protons and four neutrons. The proton at location A remains in place. What is the magnitude of the electric force on the lithium nucleus
The magnitude of the electric force on the electron is 480 x 10⁻¹⁹ N .
How to calculate the magnitude?|F-->1| = E-->1 x charge on proton
= 300 x 1.6 x 10⁻¹⁹
Magnitude of the electric force on proton
|F-->1| = 480 x 10⁻¹⁹ N .
Inside the lithium nucleus , there are three protons so charge on it
= 3 x 1.6 x 10⁻¹⁹
= 4.8 x 10⁻¹⁹ C .
The magnitude of electric force on lithium nucleus
|F-->Li| = E-->1 x charge on lithium nucleus
= 300 x 4.8 x 10⁻¹⁹
= 1440 x 10⁻¹⁹ N .
Electron has same charge as that possessed by proton so charge on electron = 1.6 x 10⁻¹⁹ C
Magnitude of force on electron
|F-->1| = E-->1 x charge on electron
= 300 x 1.6 x 10⁻¹⁹
= 480 x 10⁻¹⁹ N .
Learn more about proton on:
https://brainly.com/question/1805828
#SPJ1
Complete question
A proton at location A makes an electricfield E-->1 atlocation B. A different proton, placed atlocation B, experiences a force F--->1.
If |E-->|= 300 N/C, what is |F-->1|?
|F-->1|= N
Now the proton at B is removed and replaced by alithium nucleus, containing three protons and four neutrons. Theproton at location A remains in place.
What is the magnitude of the electric force on the lithium nucleus?
|F-->Li| = N
Now the Lithium nucleus is removed, and an electron is placed atlocation B. The proton atlocation A remains in place. What is the magnitude of the electric force on the electron?
870 kilograms to pounds
Answer:
870kg = 1,917.48 lbs
Explanation:
1 kilogram = 2.204 pounds
pounds = 870(2.204)
pounds = 1,917.48
I hope this helps!
-TheBusinessMan
Answer:
1918.35
Explanation:
multiply the value to mass... which is 2.205
so 870×2.205=1918.35
If a honeybee is flying 7.0 m/s, what is the kinetic energy (Joules) if its mass is 0.1 g?
Answer:
KINETIC ENERGY=K.E=0.00245 Joules ≈ 0.003 Joules
Explanation:
mass=m=0.1g=0.0001kg
velocity=v=7.0m/s
kinetic energy=K.E.=?
as we know that
[tex]kinetic energy=\frac{1}{2}mv^2\\ putting values\\kinetic energy=\frac{1}{2}(0.0001kg)(7.0m/s)^2\\ kinetic energy=\frac{1}{2} 0.0049joules\\kinetic energy= 0.00245Newton meter or joules[/tex]
hope it will help ^_^
a.
To improve feelings about a poor test result, a student should
Beg the teacher for a second chance at the c. Ask their parents for assistance in persuading
test
the teacher to change a grade
b. Ask for an opportunity to earn extra creditd. All of these
Please select the best answer from the choices provided
A
B
ОООО
С
D
Answer:
Well, their are two answers in their. It would be Ask their Parent for assistance in persuading and Ask for an opportunity to earn extra credit:)
Explanation:
To improve feelings about a poor test result, a student should ask for an opportunity to earn extra credits. Hence, option D is correct.
How to handle disappointment at result?Remember that you are so much more valuable than a letter on a piece of paper. Your attitude, personality, and experience are things that future employers, coworkers, teachers, friends, and family are interested in. Even while practicing excellent self-care is always important, having a program in place will help you deal with any anxiety you may be experiencing in the future.
Start with the fundamentals, like eating healthily, Getting your five a day is a fantastic place to start Since it provides your body and brain with all the nutrition they require, and it can help you deal with any cortisol increases (stress). Additionally, ensure you get at least eight hours of sleep each night and consume six to eight glasses of water each.
To improve feelings about a poor test result, a student should ask for an opportunity to earn extra credits. Hence, option D is correct.
Learn more about disappointment with results, here:
https://brainly.com/question/15269128
#SPJ5
How would you express B⃗ using unit vectors? Express your answers in terms of the unit vectors x^ and y^. Use the unit vector button under the templates menu in the answer box to create unit vectors.
Answer:
B = B (cos θ x ^ + sin θ y ^)
Explanation:
To represent the magnetic field B using unit vectors, the magnitude of the field and the angle with respect to some coordinate axis must be known. Having this information, trigonometry can be used.
Suppose that the angle we have is with respect to the positive side of the x-axis, let's use trigonometry
cos θ = Bₓ / B
sin θ = [tex]B_{y}[/tex] / B
Bx = B cos θ
B_{y} = B sin θ
so the resulting vector is
B = Bₓ i ^ + B_{y} j ^
unit vectors
x ^ = i ^
y ^ = j ^
let's write the complete answer
B = B (cos θ x ^ + sin θ y ^)
The bold indicate vector
Evaluate u + xy, for u = 1, x = 3, and y = 6.
7 A steel sphere is released from a height
of 9 m on the surface of the Moon. It is
known that the acceleration due to gravity
on the Moon is 1 the acceleration due
6
to gravity on the surface of the Earth.
Calculate the time taken by the sphere to
hit the surface of the Moon.
A 1.8 S
C 3.3 s
B 2.6 s
D 4.2 s
Answer:
C 3.3 s
Explanation:
Given:
Δy = 9 m
v₀ = 0 m/s
a = ⅙ (9.8 m/s²) = 1.63 m/s²
Find: t
Δy = v₀ t + ½ at²
9 m = (0 m/s) t + ½ (1.63 m/s²) t²
t = 3.3 s
An electric pump rated at 1000W, takes 16 seconds to pump 100 kg of water out to a tank at a height of 10 m. what is the efficiency of the motor?
Answer:
[tex] \boxed{\sf Efficiency \ of \ the \ motor = 62.5 \ \%} [/tex]
Given:
Input Power ([tex] \sf P_i [/tex])= 1000 W
Mass (m) = 100 kg
Height (h) = 10 m
Time (t) = 16 s
To Find:
Efficiency of the motor
Explanation:
[tex] \boxed{ \bold{Output \: power \: (P_o)= \frac{mgh}{t}}}[/tex]
[tex] \sf \implies P_o = \frac{100 \times 10 \times 10}{16} [/tex]
[tex] \sf \implies P_o = \frac{10000}{16} [/tex]
[tex] \sf \implies P_o = \frac{ \cancel{16} \times 625}{ \cancel{16}} [/tex]
[tex] \sf \implies P_o = 625 \: W[/tex]
[tex] \boxed{ \bold{Efficiency = \frac{Output \ Power \ (P_o)}{Input \ Power \ (P_i) } \times 100}}[/tex]
[tex]\sf \implies Efficiency = \frac{625}{10 \cancel{00}} \times \cancel{100}[/tex]
[tex]\sf \implies Efficiency = \frac{625}{10} [/tex]
[tex]\sf \implies Efficiency = 62.5 \: \%[/tex]
[tex] \therefore[/tex]
Efficiency of the motor = 62.5 %
Which combination of variables will make an experiment the most reliable?
A. One dependent variable and one experimental variable
B. One controlled variable and many experimental variables
C. Two controlled variables
D. Two experimental variables
Answer:A
Explanation: it’s A
the Velocity Ratio of a single movable Pulley is 2 why
A tennis ball moves 22 meters southward then 12 meters northward then 16 meters southward and finally 34 northward
Answer:
The tennis ball ended 8 m north from the starting point.
Explanation:
If we label North as positive and south as negative for axis of reference, then the tennis ball performed the following displacements (in units of meters):
- 22 m + 12 m - 16 m + 34 m = 8 m
Which means that it ended 8 m north from the starting point.
3. You are walking at a 1m/s velocity and carrying a tray with a ball at rest on the tray. You come to a brief stop and the ball rolls off the tray. What causes the ball to roll off the tray?
Help ????????????????
Answer:
Inertia.
Explanation:
You are moving with a speed of 1 m/s. You are carrying a tray and the ball is at rest in the tray. You stops and the ball rolls off the tray. Whenever you starts moving with a speed of 1 m/s and when ball is at rest, due to inertia of motion the ball comes in motion. But when you stops, the ball is still in motion due to its inertia.
Hence, due to inertia the ball roll off the tray.
Which is an example of potential energy? a swimmer kicking their legs a car driving on the road an arrow flying at a target a yo-yo in someone’s hand
Answer:
The yo-yo :)
Explanation:
which three metal do you think might be present in alnico explain ? ans which one are magnetic
Answer:
Aluminium, Nickel, Cobalt and Iron plus varying levels of Copper, Titanium and Niobium.
MAGNETIC: Alni, Alcomax, Hycomax, Columax, and Ticonal.
How do we represent Earth’s face?
Answer:
Human-driven changes in arrive utilize and arrive cover such as deforestation, urbanization, and shifts in vegetation designs moreover change the climate, coming about in changes to the reflectivity of the Soil surface (albedo), emanations from burning timberlands, urban warm island impacts and changes within the normal water cycle.
What is the volume of a cone with a height of 27 cm and a radius of 13 round your answer to the nearest tenth
Answer:
4.775,94
Explanation:
FORMULA:
[tex]\frac{1}{3} * 3,14 * Rx^{2} * H[/tex]
one-third per "pi" (3.14), per radius squared, per height.
Answer:
vol = 4778.36 cm³
Explanation:
volume of a cone = 1/3 π r² h
height (h) = 27 cm
radius (r) = 13 cm
plug in values:
vol = 1/3 π (13)² 27
vol = 4778.36 cm³
You serve a volleyball with a mass of 2 kg. The ball leaves your hand with a speed of 30 m/s. What is the KE of the ball? find the product
Answer:
KE= 900joules, product= 60kgm/s momentum
Explanation:
KE=1/2MV2= 1/2× 2×30×30=900J
PRODUCT= MOMENTUM= 30m/s×2kg= 60kgm/s
A car rolls down a ramp in a parking garage. The horizontal position of the car in meters over time is shown below. Graph of vertical position (in meters) on y axis and time (in seconds) on x axis. The initial position is 12 m at t=0 s, and the position decreases linearly to 6 m at t=8 s. Then the position is constant at 6 m until t=16 s, then decreases linearly to 0 m at t=24 s. Graph of vertical position (in meters) on y axis and time (in seconds) on x axis. The initial position is 12 m at t=0 s, and the position decreases linearly to 6 m at t=8 s. Then the position is constant at 6 m until t=16 s, then decreases linearly to 0 m at t=24 s. What is the displacement of the car between 0\text{ s}0 s0, start text, space, s, end text and 24\text{ s}24 s24, start text, space, s, end text? 6 \text mmstart text, m, end text What is the distance traveled by the car between 0\text{ s}0 s0, start text, space, s, end text and 24\text{ s}24 s24, start text, space, s, end text?
Answer:
d_total = 12 m
Explanation:
This is a kinematics problem, in the attachment we can see the problem graph, they ask us how much the distance is worth for all the time of 24 s.
The total distance is
d_total = d₁ + d₂ + d₃
as in the graph the part of d₂ is horizontal (v=0) the distance is zero d₂ = 0
the distance d₁ is
d₁ = 12 -6 = 6 m
the distance d₃
d₃ = 6 -0 = 6 m
therefore the total distance traveled is
d_total = 6 + 0 + 6
d_total = 12 m
How can Newton’s laws explain why the brain is in danger of injury when there is impact to the head?
Answer:
The brain moves inside the skull with a force equal and opposite to that of the impact.
Explanation:
Just need help with 1 and 2 please :D i’m having a bit of trouble :/
A truck of mass 500kg moving at 4m/s collides with another truck of mass 1500kg moving in the same direction at 2m/s. What is their common velocity just after the collision if they move off together? PLZ HELP ASAP
Answer:
m1u1+m2u2=(m1+m2)v.
500×4+1500×2=(500+1500)V.
2000+3000=2000V.
5000=2000V.
V=2.5m/s
What are the laws of nature according to C.S. Lewis? Pls hurry
Using the same cost and time estimates, consider the time-effectiveness of each engineer.
If SciTech is most concerned about meeting a deadline regardless of the cost, which engineer should the company choose?
Camilla
John
Nora
Oracio
Answer:
Camilla
Explanation:
Answer:Camilla
Explanation: